Limited Company Buy to Let Mortgages UK: The Complete 2026 Guide

If you’re a landlord weighing up your next property purchase, you’ve probably heard other investors talking about buying “through a company.” Maybe your accountant raised it. Maybe a fellow landlord swears it saved them thousands. Either way, the question lands the same: is a limited company buy to let mortgage in the UK actually worth it for you in 2026?

Here’s the short version. A limited company buy to let mortgage lets your company — rather than you personally — own and borrow against a rental property. Since the tax rules changed in 2017, this route has gone from a niche choice to the default for a huge share of landlords. A record 66,587 buy-to-let companies were set up across the UK in 2025 alone.

This guide walks you through how these mortgages work, what deposit and rates to expect, the stamp duty and tax angles that catch people out, and how to decide whether a company structure suits your plans. No jargon for the sake of it — just what matters.

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What Is a Limited Company Buy to Let Mortgage?

Put simply, it’s a mortgage where a limited company owns the property instead of you. The company applies for the loan, collects the rent, and makes the monthly repayments. You own the shares in that company, so you still control the asset and the profit — it just sits inside a corporate wrapper.

Most landlords don’t use an ordinary trading business for this. They set up what’s known as a Special Purpose Vehicle, or SPV — a company created for one job only: holding and letting property. Lenders far prefer SPVs because the structure is clean and easy to assess. A company that also sells double glazing on the side makes their risk checks a headache, so rates and choice both improve when you keep it simple.

Why Are Landlords Switching to Limited Companies in 2026?

It nearly all comes down to one piece of legislation: Section 24

Before 2017, a private landlord could deduct every penny of mortgage interest from their rental income before working out their tax bill. Section 24 ended that for individuals. Now a higher-rate or additional-rate taxpayer only gets a 20% tax credit on their mortgage interest, regardless of the rate they actually pay. For someone with a sizeable mortgage, that change quietly turned a profitable let into a far thinner one.

Companies were left untouched. A limited company can still treat mortgage interest as a normal business expense and deduct it in full. On top of that, company profits face corporation tax rather than personal income tax — which, for higher earners, is usually the cheaper outcome.

That’s why incorporation numbers keep breaking records, and the trend shows no sign of slowing.

One word of caution before you get carried away. From April 2026, the tax rate on dividends rises by two percentage points — and dividends are how most landlords take money out of a company. The structure still stacks up for many people, but the maths is personal. Speak to a landlord-specialist accountant before you commit; this is one area where generic advice can genuinely cost you.

Speak to a Mortgage Adviser — No Obligation

How Does a Limited Company Buy to Let Mortgage Work?

The mechanics differ slightly from a personal buy-to-let, so it’s worth knowing what lenders look for.

Your company. Most lenders want a UK-registered SPV with property-related SIC codes — the standard ones are 68100, 68209 and 68320. Setting this up at Companies House takes about a day and costs very little.

Affordability. Rather than judging your salary, lenders test whether the rent comfortably covers the mortgage. This is the interest coverage ratio, and for limited company lending it usually sits around 125% — the rent needs to be at least 1.25 times the monthly interest. Because company landlords can deduct that interest, the sums often work out more favourably than they do for higher-rate individuals.

Personal guarantees. Here’s the catch a lot of first-timers miss. Even though the company borrows the money, the directors almost always sign a personal guarantee. If the company can’t pay, you’re on the hook. A limited company protects you in many ways — but it doesn’t make a defaulted mortgage someone else’s problem.

Deposits and Rates — What to Expect in 2026

Expect to put down more than you would on a residential mortgage. Most limited company buy-to-let deals need a deposit of 20% to 25%, which puts you in the 75–80% loan-to-value bracket. A handful of specialist lenders stretch to 85% with a 15% deposit, but you’ll usually pay a higher rate for it.

On pricing, limited company products have historically carried a small premium over personal buy-to-let — often somewhere around 0.2% to 0.5%. In early 2026, rates across the market have broadly sat between roughly 4.5% and 6.5%, depending on the deposit, the property and the lender. That said, mortgage pricing moves constantly, so treat any figure you read as a snapshot rather than a quote.

For context, the Bank of England base rate has held at 3.75% since December 2025, with the next decision due on 18 June 2026. Fixed rates take their cue more from swap markets than the base rate directly, but the wider direction of travel still shapes what lenders offer.

Is the rate premium a dealbreaker? Usually not. A landlord paying 0.3% more on a £500,000 portfolio spends around £1,500 extra a year in interest — but a higher-rate taxpayer might save several times that in tax relief. The premium is real; for many, the saving simply dwarfs it.

Stamp Duty and the Tax Bits People Get Wrong

This is where good planning earns its keep.

Stamp duty. A common myth is that companies dodge stamp duty. They don’t. When a company buys a residential property, it pays standard Stamp Duty Land Tax plus the 5% additional dwelling surcharge — exactly the same as an individual buying a second property. There’s no company exemption, and the higher rates apply automatically, even on the company’s very first purchase.

Watch this one especially: if you transfer a property you already own personally into your company, HMRC treats it as a sale at market value. Your company pays full stamp duty on the way in, and you may face capital gains tax on the way out. That double hit is the main reason most existing landlords don’t simply shift their portfolio across — they buy new purchases through the company instead.

Corporation tax. Company profits are taxed at 19% on the first £50,000 and 25% once profits pass £250,000, with a tapered marginal relief band in between. Set that against 40% or 45% income tax for higher earners and you can see the appeal — though remember, you’ll pay tax again when you draw the money out as dividends.

None of this replaces proper advice. The interplay between corporation tax, dividend tax, capital gains and inheritance planning is genuinely intricate, and the right answer depends on your whole financial picture.

Find Out How Much Your Company Could Borrow

Limited Company vs Personal Buy to Let — Which Is Right for You?

There’s no universal winner here. The better structure depends on your tax position, how many properties you hold, and what you plan to do with the profit.

	Limited company	Personal name
Mortgage interest	Fully deductible	20% tax credit only
Profit taxed at	19–25% corporation tax	20–45% income tax
Taking profit out	Dividend/salary, taxed again	Straight to you
Stamp duty	Standard + 5% surcharge	Standard + 5% surcharge
Admin	Annual accounts, CT returns, filings	Self-assessment only
Mortgage choice	Smaller lender panel	Wider panel
Best suited to	Higher-rate payers, growing portfolios	Basic-rate payers, single lets

A company tends to make sense if you’re a higher or additional-rate taxpayer, you’re building a portfolio, or you plan to reinvest rental profit rather than spend it. If you’re a basic-rate taxpayer with one property and you need the income in your pocket each month, the extra admin and dividend tax can wipe out the benefit. For plenty of landlords in the middle, it’s genuinely close — which is exactly why tailored advice pays off.

How to Set Up a Limited Company for Buy to Let

If you decide a company is the right route, here’s the broad order of play:

1. Register your SPV at Companies House. Choose property-focused SIC codes (68100, 68209, 68320) and keep the structure simple. It’s an online job that usually completes within 24 hours.
2. Open a business bank account in the company’s name, so rent and expenses stay separate from your personal money.
3. Line up your accountant early. Landlord-specialist advice before you buy is far cheaper than untangling a mistake afterwards.
4. Speak to a specialist mortgage broker. Limited company lending is a niche, and many of the strongest products come from lenders that don’t deal with the public directly.
5. Find your property and apply. Your broker matches your company and deposit to a suitable lender, and most applications complete within around four to six weeks.

How UK Mortgage Finder can help

Finding the right limited company buy-to-let mortgage isn’t really about chasing the lowest headline rate — it’s about matching your company structure, deposit and plans to a lender that actually wants your business. That’s harder than it sounds, because a lot of the best specialist lenders only work through brokers.

UK Mortgage Finder connects you, free of charge, with FCA-regulated mortgage brokers who cover the whole of market. They’ll look at your circumstances, explain your realistic options, and handle the legwork of finding a lender suited to you — with no obligation to proceed. Whether you’re buying your first rental through a company or expanding an established portfolio, it’s a simple way to get expert eyes on your situation.

Frequently Asked Questions

Do I pay more stamp duty buying through a limited company?
No. A company pays the same Stamp Duty Land Tax as an individual buying an additional property — the standard rates plus the 5% surcharge. There’s no company exemption, but no extra residential penalty either. The exception is transferring an existing personal property in, which is taxed as a market-value purchase.

Are limited company buy-to-let rates higher than personal ones?
Usually by a small margin — often around 0.2% to 0.5%. The lender panel is smaller, which nudges pricing up. For higher-rate taxpayers, the tax saving frequently outweighs that premium.

Do I need an SPV, or can I use my existing company?
You can technically use a trading company, but lenders strongly prefer a Special Purpose Vehicle set up solely for property. SPVs are simpler to assess, so you’ll get more choice and better rates.

What SIC codes do I need?
The common property codes are 68100, 68209 and 68320. Your broker or accountant can confirm which fit your plans before you register.

Is it worth it for just one property?
Often not. With a single let and a basic-rate tax position, the cost of running a company and the dividend tax on withdrawals can cancel out the benefit. It tends to pay off as your portfolio and tax rate climb.

How much deposit do I need?
Typically 20% to 25%, though some specialist lenders accept 15% at a higher rate.

Are these mortgages regulated by the FCA?
Buy-to-let mortgages taken out for business purposes generally aren’t regulated by the Financial Conduct Authority. The brokers UK Mortgage Finder works with are FCA-regulated, so you still benefit from professional, accountable advice.

Can I move my existing rental properties into a company later?
Yes, but it’s rarely cheap. You’d usually need to sell the property to your company, triggering stamp duty for the company and potential capital gains tax for you. Many landlords instead buy future properties through the company and leave existing ones where they are.

So, Is It Worth It?

A limited company buy-to-let mortgage can be a smart, tax-efficient way to build a property portfolio in 2026 — which is exactly why so many landlords have made the move. But it isn’t automatically the right call. The structure rewards higher-rate taxpayers and portfolio builders far more than basic-rate landlords with a single property, and the upfront stamp duty and ongoing admin are real costs to weigh.

The sensible next step is to get your numbers checked by people who do this every day. Speak to a landlord-focused accountant about the tax, and a whole-of-market broker about the mortgage. Get both right, and a company structure could save you a meaningful sum for years to come.

Compare Limited Company Buy-to-Let Options with a Regulated Broker

 

Your home may be repossessed if you do not keep up repayments on your mortgage. Most buy-to-let mortgages are not regulated by the Financial Conduct Authority.

Important:

The information in this article is for guidance purposes only and does not constitute financial or tax advice. Tax treatment depends on your individual circumstances and may change. You should seek independent advice from an FCA-regulated mortgage adviser and a qualified tax professional before making any financial decisions. UK Mortgage Finder introduces customers to FCA-regulated mortgage brokers and advisers.